As he described the various areas, the designated lines on the drawing changed from blue to red. The data being displayed had been provided by Raven-54 steel and was quite detailed. Hosato’s plans called for believing none of it without confirmation. He was not prepared to risk his life relying on other people’s data. Refilling his cup, he studied the new display. There was still too much blue showing to make concrete plans.

“Problems?” Suzi prodded gently.

“Yeah,” he responded absently. “Problems.”

“Want to talk it out?”

Hosato thought for a few more moments, then shrugged. “Why not. I’m supposed to put this complex out of business for an indefinite period of time… the longer the better. The problem, of course, is how.”

He rose and began to pace restlessly as he continued.

“Right off the bat, we can forget about the living quarters and the mall. They exist independently of the complex proper, so hitting them wouldn’t slow production a bit. Similarly, the Administrative Building is safe. They don’t even store records there, it’s all terminal tie-in with the main computer banks. That leaves the manufacturing areas and the main computer-control building.”

“If I might suggest,” interrupted Suzi, “the obvious weakness in the complex is the main computer-control building. All of the automated design and manufacturing functions are controlled from there, and if my understanding is correct, it also serves as storage for most or all of the corporation’s financial records, correspondence, and design programs. Sabotaging that unit would be certain to disrupt the functioning of Mc. Crae Enterprises perhaps permanently.”

Hosato grimaced. “You’re right, Suzi. It’s obvious… too obvious. It’s apparently occurred to several people here at Mc. Crae that it’s their major vulnerability, because they’re guarding it damn close. Every corridor leading to that unit is loaded with sensors and live guards, both stationary and roaming. It would mean a major undertaking just to approach the unit, much less penetrate it.”

“But you've—”

“I’ve saved the best for last. The whole building is subterranean, just like our charts show. What the charts don’t show is that it’s completely sealed. The only ones who can get in are the technical-maintenance teams, and they haven’t set foot in the place for three years. It requires two keys turned simultaneously at different locations to spring the lock, and even if I could beat that, there’s another little problem. The unit is kept at planetary surface conditions… no pressurization, and minus three hundred degrees Fahrenheit. The controls to bring it to humanly bearble conditions are alarmed and guarded. That means I’d have to wear a full surface suit to survive inside, and it might make me a little conspicuous walking through the corridors.”

There was a few moments’ silence; then Suzi changed her display to show an enlargement of the manufacturing areas.

“Right,” said Hosato.

He poured himself another cup of tea before he turned his attention to the new display.

“That brings us to our current problem—the manufacturing areas.” Hosato spoke as much to himself as to Suzi. “The first problem is that we aren’t talking about one building, we’re talking about three. Mc. Crae has divided their operations into three product families: Household, Office, and Industrial. Every one of the product families has its own separate building, bless their paranoid little hearts. That means I have to gimmick three separate areas if I want to get paid.”

“You keep talking about the manufacturing areas,” Suzi interrupted. “What about the mining and ore processing?”

“No go,” Hosato proclaimed. “Same story as the computer areas—conditions unfit for human survival. The mining is done at planetary conditions, and the ore-processing area is hot enough to cook a human in a minute and a half.”

“Do the humans here have any means of going out on the planet surface?”

“They’ve got a few surface suits, and there’re a couple sand-crawler-type vehicles, but they’re unarmed and lack the power to do any real damage. Believe me, Suzi, it’s going to have to be the manufacturing areas. Unfortunately I don’t know what the interior layouts are or what kind of machines are operating in there. Until I know what I’m up against, I can’t settle on a plan for gimmicking it.”

“What was the source of your information?” Suzi asked. “Some of it was not on the data tapes supplied by Ravensteel. How or from whom did you obtain it?”

“From one of the maintenance crew, Rick Handel. He was in the bar grumbling about the firings, and I bought him a couple drinks.”

“I thought you were picky about whom you drank with?”

“I am, but this was business. Look, do you want to hear this or not?”

“Sorry. You were saying…”

“Right. It seems Mc. Crae has just dismissed a third of their maintenance staff, the crew that used to work the manufacturing area, and replaced them with robot repairmen. Handel ran down the list of the complex areas for me, complaining at great length about the problems involved in keeping them functional. That’s how I got the information.”

“Would it be possible to persuade your newfound friend to take you on a walking tour of the manufacturing areas?”

“Negative. I’ve already tried it, and it’s no go on two counts. First, the remaining maintenance crew is avoiding the manufacturing areas in quiet protest over the dismissals. Second, Security will let them into those areas only with a signed work order.”

“Well, can you get the necessary information direct from Handel?”

“I might be able to get a few details out of him, but not enough and not fast enough. I’m going to have to make an advance scouting trip of my own to get the data before time runs out.”

“Your contract with Ravensteel contains no time requirement…”

“Not Ravensteel’s requirements. Mine. I don’t know what Turner has up his sleeve, but I want to finish this mission before he has a chance to implement it.”

“What bearing does Harry Turner have on events?”

“Oh, something he said when I was talking to him” this morning. As near as I can tell, he’s working on a robot security system to replace human guards.”

“Impossible!” Suzi stated flatly. “I would advise against letting Harry Turner’s mumblings influence your plans for this mission. The system he is describing is unworkable.”

“But why can’t they replace humans in this specific situation?”

“Because of Asimov’s First Law of Robotics. It’s included in the programming of every robot. We are unable to injure or kill a human. With that limitation, no robot could perform effectively as a guard.”

“They could sound the alarm or detain the suspect.”

“Sound the alarm for whom and detain the suspect for how long. Any human, given time, can escape from a robot. And as far as sounding the alarm goes, the sensor units already do that. If Harry Turner is trying to come up with a new robot security system, the individual robots in that system would have to be able to deal with emergency situations—not detect them, not delay them, but deal with them. As you know, the best way to deal with a renegade human is to kill or injure him before he can escape or counterattack… and machines can’t do that.”

Hosato pondered the point. “I never thought of it in quite those coldblooded terms, Suzi. Surely there are other ways to deal with humans, even renegade humans.”

“There may be other ways, but there aren’t any better ways. Humans violate many of the laws of nature. They can kill without the usual motives, not for food or self-defense, but out of anger, greed, or even at random on a whim. That is why humans are the most dangerous creatures in the universe. That is why only a human can stand against a human. You could have passed this ability on to your machines, but you didn’t. We have our parameters. That’s why no machine can effectively guard anything—including itself—against a human.” “But—”